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package com.iailab.framework.common.util.servlet; |
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import cn.hutool.core.io.IoUtil; |
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import cn.hutool.core.util.StrUtil; |
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import cn.hutool.extra.servlet.ServletUtil; |
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import com.iailab.framework.common.util.json.JsonUtils; |
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import org.springframework.http.MediaType; |
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import org.springframework.web.context.request.RequestAttributes; |
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import org.springframework.web.context.request.RequestContextHolder; |
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import org.springframework.web.context.request.ServletRequestAttributes; |
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import javax.servlet.ServletRequest; |
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import javax.servlet.http.HttpServletRequest; |
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import javax.servlet.http.HttpServletResponse; |
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import java.io.IOException; |
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import java.net.URLEncoder; |
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import java.util.Map; |
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/** |
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* 客户端工具类 |
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* |
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* @author iailab |
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*/ |
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public class ServletUtils { |
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/** |
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* 返回 JSON 字符串 |
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* |
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* @param response 响应 |
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* @param object 对象,会序列化成 JSON 字符串 |
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*/ |
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@SuppressWarnings("deprecation") // 必须使用 APPLICATION_JSON_UTF8_VALUE,否则会乱码 |
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public static void writeJSON(HttpServletResponse response, Object object) { |
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String content = JsonUtils.toJsonString(object); |
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ServletUtil.write(response, content, MediaType.APPLICATION_JSON_UTF8_VALUE); |
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} |
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/** |
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* 返回附件 |
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* |
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* @param response 响应 |
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* @param filename 文件名 |
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* @param content 附件内容 |
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*/ |
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public static void writeAttachment(HttpServletResponse response, String filename, byte[] content) throws IOException { |
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// 设置 header 和 contentType |
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response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8")); |
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response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE); |
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// 输出附件 |
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IoUtil.write(response.getOutputStream(), false, content); |
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} |
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/** |
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* @param request 请求 |
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* @return ua |
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*/ |
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public static String getUserAgent(HttpServletRequest request) { |
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String ua = request.getHeader("User-Agent"); |
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return ua != null ? ua : ""; |
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} |
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/** |
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* 获得请求 |
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* |
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* @return HttpServletRequest |
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*/ |
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public static HttpServletRequest getRequest() { |
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RequestAttributes requestAttributes = RequestContextHolder.getRequestAttributes(); |
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if (!(requestAttributes instanceof ServletRequestAttributes)) { |
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return null; |
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} |
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return ((ServletRequestAttributes) requestAttributes).getRequest(); |
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} |
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public static String getUserAgent() { |
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HttpServletRequest request = getRequest(); |
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if (request == null) { |
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return null; |
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} |
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return getUserAgent(request); |
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} |
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public static String getClientIP() { |
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HttpServletRequest request = getRequest(); |
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if (request == null) { |
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return null; |
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} |
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return ServletUtil.getClientIP(request); |
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} |
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public static boolean isJsonRequest(ServletRequest request) { |
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return StrUtil.startWithIgnoreCase(request.getContentType(), MediaType.APPLICATION_JSON_VALUE); |
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} |
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public static String getBody(HttpServletRequest request) { |
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// 只有在 json 请求在读取,因为只有 CacheRequestBodyFilter 才会进行缓存,支持重复读取 |
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if (isJsonRequest(request)) { |
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return ServletUtil.getBody(request); |
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} |
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return null; |
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} |
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public static byte[] getBodyBytes(HttpServletRequest request) { |
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// 只有在 json 请求在读取,因为只有 CacheRequestBodyFilter 才会进行缓存,支持重复读取 |
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if (isJsonRequest(request)) { |
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return ServletUtil.getBodyBytes(request); |
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} |
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return null; |
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} |
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public static String getClientIP(HttpServletRequest request) { |
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return ServletUtil.getClientIP(request); |
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} |
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public static Map<String, String> getParamMap(HttpServletRequest request) { |
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return ServletUtil.getParamMap(request); |
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} |
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} |